Juve

Personally I like to run my goliaths with 2 grenade launchers, 1 on my leader and 1 on a ganger. It can break up your opponents groups to stop multiple units activating at once and taking down your gangers.
You could probably lose one of your gangers and/or downgrade a champion to free up credits and get some better equipment for the rest as Goliath's don't need to be spammy like eschers as they have a very low cool check and can pass bottle tests fairly easily.
With that in mind, Ironwill is probably a bit wasted on the leader so you should probably swap that for something like fearsome to make it harder for him to get charged leaving him able to launch grenades everywhere. I also recomend the berserker skill on a melee champion as that gives you an extra attack on the charge, combine that with a Stimm-Slug Stash and the Brutal Charge tactic and you're almost guranteed to kill whatever he charges.